wifi: assignment of PCI device failed

[Johannes Kliemann]

Hi Alex,

as we have discussed yesterday, I tried enabling and disabling Vt-d.
This does deterministically affect the PCI assignment so I think that
missing Vt-d was the reason for the PCI error.

Yet this doesn't explain the second error that iwl is timing out waiting
for the hardware.

Regards,
Johannes

Am 05.12.2017 um 17:06 schrieb Johannes Kliemann:
> Hi Alex,
> 
> thanks to your hint with Issue #2207 I was able to get the value of res
> which is 9. What I find interesting is the fact that it now seems to be
> able to assign the PCI device as you can see in [1].
> 
>> [platform_drv] wifi_drv -> : assignment of PCI device 4:0.0 succeeded
> 
> Yet everything else seems to behave as before. The timeout errors still
> appear and there doesn't seem to be any actual connection attempt.
> 
> I have built this from [2] which currently incorporates log_core_kernel,
> NOVA VGA support and benders fix free memory calculation (if this
> information is useful to you).
> 
> Regards,
> Johannes
> 
> [1]: https://imgur.com/a/osaVJ
> [2]:
> https://github.com/jklmnn/genode/tree/8a64415f52df2dee30e8fcd279e16d1b18eb2fb9
> 
> Am 04.12.2017 um 22:14 schrieb Alexander Boettcher:
>> Hello,
>>
>> On 04.12.2017 10:04, Johannes Kliemann wrote:
>>> Hi all,
>>>
>>> I tried to use the Wifi driver for Intel wifi chips.
>>> When running the driver I get the following messages:
>>>
>>>> [platform_drv] Error: wifi_drv -> : assignment of PCI device 4:0.0
>>> failed phys=0xf8400000 virt=0x10
>>> and
>>>
>>>> [wifi_drv] [iwl_trans_pcie_grap_nic_access] *WARN* Timeout waiting for
>>> hardware access (CSR_GP_CNTRL 0xffffffff)
>>>
>>> The corresponding run file [1] is explicitly written without any default
>>> routes. I can only provide a photo of the log output [2] (at least the
>>> visible part) as I don't have any other debug method yet on this hardware.
>>>
>>> I thought that this was a missing route but I couldn't find a related
>>> message and assigning default routes didn't fix it.
>>> The error seems to appear in
>>> repos/base-nova/src/core/pd_session_support.cc:assign_pci returning
>>> false but I couldn't find out why this happens.
>>> Does anyone have an idea?
>>
>> What is or maybe are the value(s) for the variable 'res' in
>> repos/base-nova/src/core/pd_session_support.cc:assign_pci ?
>>
> 
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